package cn.unknowpupil.init.configure.security;

import cn.unknowpupil.init.common.service.JwtUserDetailsService;
import cn.unknowpupil.init.configure.oauth.UsernamePasswordProvider;
import cn.unknowpupil.init.fliter.JwtAuthenticationTokenFilter;
import cn.unknowpupil.init.interceptor.AccessDeniedHandlerImpl;
import cn.unknowpupil.init.interceptor.AuthenticationEntryPointImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.web.filter.CorsFilter;

/**
 * Created at 2020/10/19 by w10g <br>
 * Initialize WebSecurityConfiguration ... <br>
 *
 * @author unknowpupil
 * @since 0.0.1
 */
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true, jsr250Enabled = true)
public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {
    /**
     * @跨域过滤器
     */
    @Autowired
    private CorsFilter corsFilter;

    @Autowired
    private JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter;

    @Autowired
    private AuthenticationEntryPointImpl authenticationEntryPoint;
    @Autowired
    private AccessDeniedHandlerImpl accessDeniedHandler;
    @Autowired
    private UsernamePasswordProvider usernamePasswordProvider;
    @Autowired
    private JwtUserDetailsService jwtUserDetailsService;

    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        auth.authenticationProvider(usernamePasswordProvider);
        auth.userDetailsService(jwtUserDetailsService).passwordEncoder(passwordEncoder());
    }

    /**
     * anyRequest          |   匹配所有请求路径
     * access              |   SpringEl表达式结果为true时可以访问
     * anonymous           |   匿名可以访问
     * denyAll             |   用户不能访问
     * fullyAuthenticated  |   用户完全认证可以访问（非remember-me下自动登录）
     * hasAnyAuthority     |   如果有参数，参数表示权限，则其中任何一个权限可以访问
     * hasAnyRole          |   如果有参数，参数表示角色，则其中任何一个角色可以访问
     * hasAuthority        |   如果有参数，参数表示权限，则其权限可以访问
     * hasIpAddress        |   如果有参数，参数表示IP地址，如果用户IP和参数匹配，则可以访问
     * hasRole             |   如果有参数，参数表示角色，则其角色可以访问
     * permitAll           |   用户可以任意访问
     * rememberMe          |   允许通过remember-me登录的用户访问
     * authenticated       |   用户登录后可访问
     */
    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {
        httpSecurity
                // CSRF禁用，因为不使用session
                .csrf().disable()
                // 认证失败处理类
                .exceptionHandling().authenticationEntryPoint(authenticationEntryPoint).and()
                // 基于token，所以不需要session
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
                // 过滤请求
                .authorizeRequests()
                // 对于登录login 验证码captchaImage 允许匿名访问
                .antMatchers("/api/**", "/admin/login","/admin/captcha").permitAll()
                .antMatchers(AUTH_WHITELIST).permitAll()
                .antMatchers("/common/**").anonymous()
                // 文件
                .antMatchers("/avatar/**").permitAll()
                .antMatchers("/file/**").permitAll()
                // 除上面外的所有请求全部需要鉴权认证
                .anyRequest().authenticated()
                .and()
                .headers().frameOptions().disable();
        httpSecurity.exceptionHandling().accessDeniedHandler(accessDeniedHandler);
        httpSecurity.addFilterBefore(jwtAuthenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
        // 添加CORS filter
        httpSecurity.addFilterBefore(corsFilter, JwtAuthenticationTokenFilter.class);

        // disable page caching
        httpSecurity
                .headers()
                .frameOptions().sameOrigin()  // required to set for H2 else H2 Console will be blank.
                .cacheControl();
    }


    /**
     * 关闭掉密码验证，使用自己的密码验证
     *
     * @return
     */
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new PasswordEncoder() {
            @Override
            public String encode(CharSequence charSequence) {
                return "";
            }

            @Override
            public boolean matches(CharSequence charSequence, String s) {
                return true;
            }
        };
    }

    /**
     * 强散列哈希加密实现
     */
    @Bean
    public BCryptPasswordEncoder bCryptPasswordEncoder() {
        return new BCryptPasswordEncoder();
    }

    /**
     * Register Security Auth Manager
     *
     * @return
     * @throws Exception
     */
    @Override
    @Bean
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    private static final String[] AUTH_WHITELIST = {
            // -- swagger ui
            "/swagger-ui.html",
            "/swagger-ui/*",
            "/swagger-resources/**",
            "/v2/api-docs",
            "/v3/api-docs",
            "/webjars/**",
            "/*.html",
            "/error",
            "/**/*.html",
            "/**/*.css",
            "/**/*.js"
    };
}
